Just came across this WARNING (running latest git kernel):
Mar 29 09:14:39 gentoo kernel: udev[888]: starting version 164
Mar 29 15:45:45 gentoo kernel: ------------[ cut here ]------------
Mar 29 15:45:45 gentoo kernel: WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2b0()
Mar 29 15:45:45 gentoo kernel: Hardware name: System Product Name
Mar 29 15:45:45 gentoo kernel: Pid: 688, comm: kworker/u:6 Not tainted 2.6.38-09065-g89078d5 #23
Mar 29 15:45:45 gentoo kernel: Call Trace:
Mar 29 15:45:45 gentoo kernel: [<ffffffff81073fea>] warn_slowpath_common+0x7a/0xb0
Mar 29 15:45:45 gentoo kernel: [<ffffffff8107410a>] warn_slowpath_null+0x1a/0x20
Mar 29 15:45:45 gentoo kernel: [<ffffffff8130fe46>] ttm_put_pages+0x1c6/0x2b0
Mar 29 15:45:45 gentoo kernel: [<ffffffff8130889d>] ttm_tt_free_alloced_pages+0xbd/0x100
Mar 29 15:45:45 gentoo kernel: [<ffffffff8130933c>] ttm_tt_swapout+0x1ac/0x2a0
Mar 29 15:45:45 gentoo kernel: [<ffffffff8130ab85>] ttm_bo_swapout+0x1a5/0x230
Mar 29 15:45:45 gentoo kernel: [<ffffffff812fcefc>] ? drm_mm_kmalloc+0x3c/0xd0
Mar 29 15:45:45 gentoo kernel: [<ffffffff81307d38>] ttm_shrink+0xd8/0x120
Mar 29 15:45:45 gentoo kernel: [<ffffffff8108f101>] ? queue_delayed_work_on+0x91/0x100
Mar 29 15:45:45 gentoo kernel: [<ffffffff81307d80>] ? ttm_shrink+0x120/0x120
Mar 29 15:45:45 gentoo kernel: [<ffffffff81307d99>] ttm_shrink_work+0x19/0x20
Mar 29 15:45:45 gentoo kernel: [<ffffffff8108e0ae>] process_one_work+0x11e/0x4c0
Mar 29 15:45:45 gentoo kernel: [<ffffffff8108ea2e>] worker_thread+0x15e/0x340
Mar 29 15:45:45 gentoo kernel: [<ffffffff8108e8d0>] ? manage_workers.isra.28+0x220/0x220
Mar 29 15:45:45 gentoo kernel: [<ffffffff8109348c>] kthread+0x8c/0xa0
Mar 29 15:45:45 gentoo kernel: [<ffffffff8156e814>] kernel_thread_helper+0x4/0x10
Mar 29 15:45:45 gentoo kernel: [<ffffffff81093400>] ? kthread_flush_work_fn+0x20/0x20
Mar 29 15:45:45 gentoo kernel: [<ffffffff8156e810>] ? gs_change+0xb/0xb
Mar 29 15:45:45 gentoo kernel: ---[ end trace d5b07e4231e70291 ]---
Mar 29 15:45:45 gentoo kernel: ------------[ cut here ]------------
...
It's repeated ad nauseam from there on. (/var/log/kern.log is now over
85MB in size)
--
Markus
On 2011.03.29 at 16:56 +0200, Markus Trippelsdorf wrote:
> Just came across this WARNING (running latest git kernel):
>
> Mar 29 09:14:39 gentoo kernel: udev[888]: starting version 164
> Mar 29 15:45:45 gentoo kernel: ------------[ cut here ]------------
> Mar 29 15:45:45 gentoo kernel: WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2b0()
> Mar 29 15:45:45 gentoo kernel: Hardware name: System Product Name
It happened again today.
------------[ cut here ]------------
WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2c0()
Hardware name: System Product Name
Pid: 680, comm: kworker/u:6 Not tainted 2.6.39-rc1-00254-gd297f96 #5
Call Trace:
[<ffffffff810736af>] warn_slowpath_common+0x6f/0xa0
[<ffffffff810737fa>] warn_slowpath_null+0x1a/0x20
[<ffffffff812c7726>] ttm_put_pages+0x1c6/0x2c0
[<ffffffff812bff7d>] ttm_tt_free_alloced_pages+0xbd/0x100
[<ffffffff812c0a5c>] ttm_tt_swapout+0x1bc/0x2c0
[<ffffffff812c2365>] ttm_bo_swapout+0x1a5/0x240
[<ffffffff812b5637>] ? drm_mm_kmalloc+0x37/0xe0
[<ffffffff812bf3b8>] ttm_shrink+0xd8/0x140
[<ffffffff8108eb01>] ? queue_work+0x21/0x60
[<ffffffff812bf420>] ? ttm_shrink+0x140/0x140
[<ffffffff812bf439>] ttm_shrink_work+0x19/0x20
[<ffffffff8108dade>] process_one_work+0x11e/0x4e0
[<ffffffff8108e4ce>] worker_thread+0x16e/0x360
[<ffffffff8108e360>] ? manage_workers.isra.28+0x260/0x260
[<ffffffff810932ac>] kthread+0x8c/0xa0
[<ffffffff8152a394>] kernel_thread_helper+0x4/0x10
[<ffffffff81093220>] ? kthread_flush_work_fn+0x20/0x20
[<ffffffff8152a390>] ? gs_change+0xb/0xb
---[ end trace cb7fc1aad109a0a7 ]---
------------[ cut here ]------------
So its not a easily reproducible problem. My config and a full dmesg are
attached, in case anybody is interested.
--
Markus
On 2011.04.05 at 18:31 +0200, Markus Trippelsdorf wrote:
> On 2011.03.29 at 16:56 +0200, Markus Trippelsdorf wrote:
> > Just came across this WARNING (running latest git kernel):
> >
> > Mar 29 09:14:39 gentoo kernel: udev[888]: starting version 164
> > Mar 29 15:45:45 gentoo kernel: ------------[ cut here ]------------
> > Mar 29 15:45:45 gentoo kernel: WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2b0()
> > Mar 29 15:45:45 gentoo kernel: Hardware name: System Product Name
> It happened again today.
>
> ------------[ cut here ]------------
> WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2c0()
> Hardware name: System Product Name
> Pid: 680, comm: kworker/u:6 Not tainted 2.6.39-rc1-00254-gd297f96 #5
> Call Trace:
> [<ffffffff810736af>] warn_slowpath_common+0x6f/0xa0
> [<ffffffff810737fa>] warn_slowpath_null+0x1a/0x20
> [<ffffffff812c7726>] ttm_put_pages+0x1c6/0x2c0
> [<ffffffff812bff7d>] ttm_tt_free_alloced_pages+0xbd/0x100
> [<ffffffff812c0a5c>] ttm_tt_swapout+0x1bc/0x2c0
> [<ffffffff812c2365>] ttm_bo_swapout+0x1a5/0x240
> [<ffffffff812b5637>] ? drm_mm_kmalloc+0x37/0xe0
> [<ffffffff812bf3b8>] ttm_shrink+0xd8/0x140
> [<ffffffff8108eb01>] ? queue_work+0x21/0x60
> [<ffffffff812bf420>] ? ttm_shrink+0x140/0x140
> [<ffffffff812bf439>] ttm_shrink_work+0x19/0x20
> [<ffffffff8108dade>] process_one_work+0x11e/0x4e0
> [<ffffffff8108e4ce>] worker_thread+0x16e/0x360
> [<ffffffff8108e360>] ? manage_workers.isra.28+0x260/0x260
> [<ffffffff810932ac>] kthread+0x8c/0xa0
> [<ffffffff8152a394>] kernel_thread_helper+0x4/0x10
> [<ffffffff81093220>] ? kthread_flush_work_fn+0x20/0x20
> [<ffffffff8152a390>] ? gs_change+0xb/0xb
> ---[ end trace cb7fc1aad109a0a7 ]---
> ------------[ cut here ]------------
Looks like this is caused by f9820a46dd7888b05a36e81166fb1abcc47dcc3f :
ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set.
CCing the relevant people.
--
Markus
Dave, Konrad
I think we need to back out this change as soon as possible. I will
follow up the discussion with Konrad on how we should attempt to handle
vm passthrough as soon as things settle down a bit over here. Hopefully
this week.
Thomas
On 04/06/2011 10:54 AM, Markus Trippelsdorf wrote:
> On 2011.04.05 at 18:31 +0200, Markus Trippelsdorf wrote:
>
>> On 2011.03.29 at 16:56 +0200, Markus Trippelsdorf wrote:
>>
>>> Just came across this WARNING (running latest git kernel):
>>>
>>> Mar 29 09:14:39 gentoo kernel: udev[888]: starting version 164
>>> Mar 29 15:45:45 gentoo kernel: ------------[ cut here ]------------
>>> Mar 29 15:45:45 gentoo kernel: WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2b0()
>>> Mar 29 15:45:45 gentoo kernel: Hardware name: System Product Name
>>>
>> It happened again today.
>>
>> ------------[ cut here ]------------
>> WARNING: at drivers/gpu/drm/ttm/ttm_page_alloc.c:758 ttm_put_pages+0x1c6/0x2c0()
>> Hardware name: System Product Name
>> Pid: 680, comm: kworker/u:6 Not tainted 2.6.39-rc1-00254-gd297f96 #5
>> Call Trace:
>> [<ffffffff810736af>] warn_slowpath_common+0x6f/0xa0
>> [<ffffffff810737fa>] warn_slowpath_null+0x1a/0x20
>> [<ffffffff812c7726>] ttm_put_pages+0x1c6/0x2c0
>> [<ffffffff812bff7d>] ttm_tt_free_alloced_pages+0xbd/0x100
>> [<ffffffff812c0a5c>] ttm_tt_swapout+0x1bc/0x2c0
>> [<ffffffff812c2365>] ttm_bo_swapout+0x1a5/0x240
>> [<ffffffff812b5637>] ? drm_mm_kmalloc+0x37/0xe0
>> [<ffffffff812bf3b8>] ttm_shrink+0xd8/0x140
>> [<ffffffff8108eb01>] ? queue_work+0x21/0x60
>> [<ffffffff812bf420>] ? ttm_shrink+0x140/0x140
>> [<ffffffff812bf439>] ttm_shrink_work+0x19/0x20
>> [<ffffffff8108dade>] process_one_work+0x11e/0x4e0
>> [<ffffffff8108e4ce>] worker_thread+0x16e/0x360
>> [<ffffffff8108e360>] ? manage_workers.isra.28+0x260/0x260
>> [<ffffffff810932ac>] kthread+0x8c/0xa0
>> [<ffffffff8152a394>] kernel_thread_helper+0x4/0x10
>> [<ffffffff81093220>] ? kthread_flush_work_fn+0x20/0x20
>> [<ffffffff8152a390>] ? gs_change+0xb/0xb
>> ---[ end trace cb7fc1aad109a0a7 ]---
>> ------------[ cut here ]------------
>>
> Looks like this is caused by f9820a46dd7888b05a36e81166fb1abcc47dcc3f :
>
> ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set.
>
> CCing the relevant people.
>
>
On Wed, Apr 06, 2011 at 11:13:59AM +0200, Thomas Hellstrom wrote:
> Dave, Konrad
>
> I think we need to back out this change as soon as possible. I will
> follow up the discussion with Konrad on how we should attempt to
> handle vm passthrough as soon as things settle down a bit over here.
Ok. I believe just reverting this particular git commit
69a07f0b117a40fcc1a479358d8e1f41793617f2
does it. Doing it on top of v2.6.39-rc1:
ated: 2427 deleted: 1229), skipping inexact rename detection
Finished one revert.
[stable/ttm.pci-api-rc2 97bbc38] Revert "ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set."
1 files changed, 3 insertions(+), 23 deletions(-)
shows it to being a nice easy backout.
Dave, I stuck the revert on
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/ttm.pci-api-rc2
Please pull for rc2.
> Hopefully this week.
Thomas, waiting for your input on
http://mid.gmane.org/[email protected]
(ignore point 1, please).
.. snip..
> >Looks like this is caused by f9820a46dd7888b05a36e81166fb1abcc47dcc3f :
Wrong git commit.
> >
> > ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set.
It is 69a07f0b117a40fcc1a479358d8e1f41793617f2
> >
> >CCing the relevant people.
How did you make the machine to do this? Did you just echo XX > to the shrinker?
> >
On 2011.04.06 at 08:27 -0400, Konrad Rzeszutek Wilk wrote:
> On Wed, Apr 06, 2011 at 11:13:59AM +0200, Thomas Hellstrom wrote:
> > Dave, Konrad
> >
> > I think we need to back out this change as soon as possible. I will
> > follow up the discussion with Konrad on how we should attempt to
> > handle vm passthrough as soon as things settle down a bit over here.
>
> Ok. I believe just reverting this particular git commit
>
> 69a07f0b117a40fcc1a479358d8e1f41793617f2
>
> does it. Doing it on top of v2.6.39-rc1:
>
> ated: 2427 deleted: 1229), skipping inexact rename detection
> Finished one revert.
> [stable/ttm.pci-api-rc2 97bbc38] Revert "ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set."
> 1 files changed, 3 insertions(+), 23 deletions(-)
>
> shows it to being a nice easy backout.
>
> Dave, I stuck the revert on
>
> git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/ttm.pci-api-rc2
>
> Please pull for rc2.
> .. snip..
> > >Looks like this is caused by f9820a46dd7888b05a36e81166fb1abcc47dcc3f :
>
> Wrong git commit.
>
> > >
> > > ttm: Utilize the DMA API for pages that have TTM_PAGE_FLAG_DMA32 set.
>
> It is 69a07f0b117a40fcc1a479358d8e1f41793617f2
Oops, you're right. (copy&paste error)
> > >CCing the relevant people.
>
> How did you make the machine to do this? Did you just echo XX > to the shrinker?
No, I've just used the machine normally (browsing the net, viewing pdfs,
etc.) and triggered the warning two times in the last couple of days.
--
Markus